George r



(No Model.)

G. R. DUVAL. TRACTION WHEEL.

No. 450,484. Patented Apr. 14,1891.

I UNITED STATES PATENT Curler;

GEORGE R. DUVAL, OF BENICIA, CALIFORNIA, ASSIGNOR TO THE BENICIA AGRICULTURAL IVORKS, OF SAME PLACE.

TRACTlON-WH EEL.

SPECIFICATION forming part of Letters Patent No. 450,484, dated April 14, 1891.

Application filed February 4, 1891. Serial No. 380,195. (No model.)

To aZZ whom it may concern: O is the hub of the wheel, which is fitted to Be it known that I, GEORGE R. DUVAL, a the shaft or axle in any suitable manner, so citizen of the United States, residing at Benias to either turn with the shaft or, as in the ma, Solano county, State of California, have present case, to turn loosely upon it. 55 invented an Improvement in Traction-Engine D are disks projecting radially from each \Vheels; and I hereby declare the following side of the hub and having the outwardly and to be a full, clear, and exact description of inwardly turned flanges E and F, with holes the same. made through them at suitable angles to re- My invention relates to certain improveceive the spokes which connect them with the 60 IO ments in the construction of metallic wheels, wheel-rim. The spokes G pass through the and it is especially applicable to wheels of outerflange's E, and, crossing each other, are large size, such as are employed for tractionbolted to the inner sides of the exterior felengines and through which power is translies B. The spokes II pass through the inner mitted to propel the engine over the ground flanges F and extend outwardly, converging 6 5 r 5 and haul loads or agricultural machinery. to the central felly B, to which they are bolted,

It consists incertain details of construct-ion the spokes thus crossing each other in such a which will be more fully explained by refermanner as to brace the wheel and make it ence to the accompanying drawings, in very rigid to resist end-thrusts. Theinner ends which of the spokes G and II are screw-threaded, 7o

Figure 1 is a side elevation of my wheel, and locking-nuts are fitted uponthese screwshowing theattachment and sprocket or chainthreads outside and inside of the hub-flanges driving wheel. Fig. 2 is atransverse section through which they pass, and by means of taken through the plane of the axis. these nuts the hub is accurately centered in In the construction of wheels of this class, the wheel, the propertension isbrought upon 75 which are intended to support heavy weights, the spokes, and they are locked in place so and which often traverse rough and stony that they will not become loose. roads, it is important to construct the wheel In order to apply power to drive this wheel, in such amanner as to make it exceedingly I have shown a chain driving or sprocket rigid and capable of resistingtorsionalstrains wheel I. This wheel is preferably made in 80 and such strains as arise from the swaying of sections and has a diameter smaller than the the engine which causes an end-motion in the diameter of the main wheel. direction of the axis, and also to so construct From the sprocket Wheel sections stout the wheel-rims as to give them sufficient rigidarms J extend ashort distance inwardly from ity to prevent their being bent and indented the side and then turn outwardly and extend 85 without making them extraordinarily heavy to the rim of the wheel. These arms have and unwieldy. holes made through them, and the bolts which My present drawings are taken from a mapass through the outer ends of the spokes G chine in actual use, the wheels of which are upon that side pass through these sprocketten and one-half feet in diameter. wheel arms, and thus secure them strongly to oo 4 A is thetire orrim ofawheel,whichis made the felly of the wheel. If preferred, the

of heavy boileriron or sheet-steel, andB B sprocket-wheel arms may be bolted to the are flanges or fellies, one of which is fitted felly independently of the wheel-spokes; but around the outer edge upon each side of the by bolting them at the same points the numwheel. These fellies aremadeof iron orsteel ber of holes and bolts will be diminished: 95

and of sufficient strength and rigidity to re- Lugs or extensions K project from the inner sist any tendency to bend or indent the rim periphery of the sprocket-wheel sections, and of the wheel. As many of these fellies may be have holes made through them which serve introducedbetween the twooutsideones as the for the passage of bolts, these bolts passing width of the face of the wheel requires. In through the ends of braces L, which are thus loo 5 the present case I have shown a single censtrongly united to the sprocket-wheel sections tral one, and the rim is riveted to these follies. at as many points as may be desired. These braces L extend across the wheel inside of the fellies B, and are bolted tothe outer telly upon the side opposite to which the sprocketwheel is attached. By this construction a sprocket-wheel of any diameter may be attached to the main wheel and supported at a sufficient distance from its side to insure the free travel of the driving-chain without contact with the wheel-rim, and by reason of the diagonal braces L the sprocket-wheel is rendered as strong and rigid as it is possible to make.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a wheel, the outer rim ortire,aseries of fellies fitted around the interior of said rim, bolts by which the rim is secured to the fellies, a central hub having exterior and interior flanges, and spokes passing through the exterior flanges, crossing each other to the opposite exterior fellies of the wheel, other spokes passing through the interior flanges and converging to the interior felly or fellies of the wheel, and nuts by which the tension and adjustment are regulated, substantially as herein described.

2. In a wheel, the exterior rim, a series of crossing each other and having their inner ends connected with flanges ot' a central wheelhub, and a second series of spokes bolted to thecentralfellies of the wheel and diverging to the interior flanges of the wheel-hub, and locknnts fitting the screw-threaded inner ends of said spokes outside and inside of the hubflanges, substantially as herein described.

3. The wheel consisting of the outer rim with fellies, a flanged hub, and spokes conmeeting the hub and fellies, as shown, in combination withasprocket-wheel having the outwardly-extending arms J bolted to the wheelt'elly upon one side, substantially as herein described.

t. The wheel having the outer rim, fellies to which said rim is bolted, a central hub with flanges and diagonally-disposed spokes connecting the hub-flanges and rim-fellies, as shown, in combination with the sprocketwheel sections, having the curved outwardlyextending arms J, and bolts by which said arms are secured to the wheel-telly upon one side, and diagonal braces L, extending from the sprocket-wheel across the interior of the main wheel, and bolts by which said braces are united to the outer felly of the wheel, sub stantially as herein described.

In witness whereof I have hereunto set my hand.

GEORGE R. DUVAL. 1 "Witnesses:

T. B. MONTGOMERY,

F. ULYNE. 

